Levely and boistrous on their own are not a danger sign in teacher speak. Coupled with 'finds it difficult to consider the needs of others', 'can sometimes make relevant comments in class' and 'can, on occasion, produce work of a satisfactory standard', you should worry.
L & B can ofetn be used to describe what my dear old non-pc ma used to call 'a real boy'.
Look at the whole picture is the key. I have used L & B to describe some of my y10 boys who have just got straight A*s in their module tests. They are lively, over chatty, sometimes silly, need to concentrate, crap at presentation, chaotic with their home work, utterly brilliant and the best fun I have all week!